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Finding the Fourth Proportional to 13,894.20, 20,843.10 and 6,877.80

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Solution

The fourth proportional to 13,894.20, 20,843.10 and 6,877.80 is: 10,317.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,894.20 : 20,843.10 = 6,877.80 : x
  2. Step 2: Convert to fraction form
    13,894.20/20,843.10 = 6,877.80/x
  3. Step 3: Cross multiply
    13,894.20x = 20,843.10 × 6,877.80
  4. Step 4: Simplify right side
    13,894.20x = 143,354,673.18
  5. Step 5: Solve for x
    x = 143,354,673.18/13,894.20
  6. Step 6: Final answer
    x = 10,317.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.